'How to resolve 'error - InvalidDatasourceError: Datasource URL should use prisma'

So I am using Prisma as an ORM on my project to communicate with the database that I set up with AWS. Not happy with the AWS service I am now switching my database to railway.app - which is working out well for me. However, I set up a Prisma data proxy on my app with the AWS connection string, and now that I don't seem to want/ need it anymore I removed it but getting an error:

error - InvalidDatasourceError: Datasource URL should use Prisma:// protocol. 
If you are not using the Data Proxy, remove the data proxy from the preview features in your 
schema and ensure that PRISMA_CLIENT_ENGINE_TYPE environment variable is not set to data proxy.

Since getting the error I have removed previewFeatures = ["dataProxy"] from the prisma.schema file to make it look like this (back to what it was before configuring with dataproxy):

generator client {
      provider = "prisma-client-js"
}

datasource db {
      provider = "postgresql"
      url= env("DATABASE_URL")
}

but the error still persists, how do I fix this?

next.js prisma

Solution 1:^[1]

running prisma generate fixes this issue

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'How to resolve 'error - InvalidDatasourceError: Datasource URL should use prisma'

Solution 1:[1]

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Solution 1:^[1]